C#超实用代码段合集
更新时间：2020年6月25日 11:26 点击：2836
本文实例总结了几个非常实用的C#代码。分享给大家供大家参考，具体如下：
1. C#在托盘显示图标
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace notifyIconShow
{
public partial class notifyIconShow : Form
{
public notifyIconShow()
{
InitializeComponent();
}
#region//设置鼠标放在托盘图标上面的文字
/// <summary>
/// 方法名称：notifyIconShow_Load(窗体加载事件)
/// 方法作用：设置鼠标放在托盘图标上面的文字
/// 完成日期：2010年5月16日
/// 作者：心语
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void notifyIconShow_Load(object sender, EventArgs e)
{
//设置鼠标放在托盘图标上面的文字
this.notifyIcon1.Text = "心语托盘图标";
}
#endregion
#region//创建对象及声明变量
//创建NotifyIcon对象
NotifyIcon notifyicon = new NotifyIcon();
//创建托盘图标对象
Icon ico = new Icon("Clock2.ico");
//创建托盘菜单对象
ContextMenu notifyContextMenu = new ContextMenu();
#endregion
#region//隐藏任务栏图标，显示托盘图标
/// <summary>
/// 方法名称：notifyIconShow_SizeChanged(窗体大小改变后事件)
/// 方法作用：隐藏任务栏图标，显示托盘图标
/// 完成日期：2010年5月16日
/// 作者：心语
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void notifyIconShow_SizeChanged(object sender, EventArgs e)
{
//判断是否选择的是最小化按钮
if (WindowState == FormWindowState.Minimized)
{
//托盘显示图标等于托盘图标对象
//注意notifyIcon1是控件的名字而不是对象的名字
notifyIcon1.Icon = ico;
//隐藏任务栏区图标
this.ShowInTaskbar = false;
//图标显示在托盘区
notifyicon.Visible = true;
}
}
#endregion
#region//还原窗体
/// <summary>
/// 方法名称：notifyIcon1_Click（托盘图标单击）
/// 方法作用：还原窗体
/// 完成日期：2010年5月16日
/// 作者：心语
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void notifyIcon1_Click(object sender, EventArgs e)
{
//判断是否已经最小化于托盘
if (WindowState == FormWindowState.Minimized)
{
//还原窗体显示
WindowState = FormWindowState.Normal;
//激活窗体并给予它焦点
this.Activate();
//任务栏区显示图标
this.ShowInTaskbar = true;
//托盘区图标隐藏
notifyicon.Visible = false;
}
}
#endregion
}
}
2. C#求最小公倍数
class Program
{
static void Main(string[] args)
{
int n = m(20, 15);
System.Console.WriteLine("最小公倍数为:" + n.ToString());
System.Console.Read();
}
static int f(int a, int b)//最大公约数
{
if (a < b) { a = a + b; b = a - b; a = a - b; }
return (a % b == 0) ? b : f(a % b, b);
}
static int m(int a, int b)//最小公倍数
{
return a * b / f(a, b);
}
}
3. C#汉字转拼音
/// <summary>
/// 把汉字转换成拼音(全拼)
/// </summary>
/// <param name="hzString">汉字字符串</param>
/// <returns>转换后的拼音(全拼)字符串</returns>
public static string ConvertE(string hzString)
{
// 匹配中文字符
Regex regex = new Regex("^[\u4e00-\u9fa5]$");
byte[] array = new byte[2];
string pyString = "";
int chrAsc = 0;
int i1 = 0;
int i2 = 0;
char[] noWChar = hzString.ToCharArray();
for (int j = 0; j < noWChar.Length; j++)
{
// 中文字符
if (regex.IsMatch(noWChar[j].ToString()))
{
array = System.Text.Encoding.Default.GetBytes(noWChar[j].ToString());
i1 = (short)(array[0]);
i2 = (short)(array[1]);
chrAsc = i1 * 256 + i2 - 65536;
if (chrAsc > 0 && chrAsc < 160)
{
pyString += noWChar[j];
}
else
{
// 修正部分文字
if (chrAsc == -9254) // 修正“圳”字
pyString += "Zhen";
else
{
for (int i = (pyValue.Length - 1); i >= 0; i--)
{
if (pyValue[i] <= chrAsc)
{
pyString += pyName[i];
break;
}
}
}
}
}
// 非中文字符
else
{
pyString += noWChar[j].ToString();
}
}
return pyString;
}
private static int[] pyValue = new int[]
{
-20319,-20317,-20304,-20295,-20292,-20283,-20265,-20257,-20242,-20230,-20051,-20036,
-20032,-20026,-20002,-19990,-19986,-19982,-19976,-19805,-19784,-19775,-19774,-19763,
-19756,-19751,-19746,-19741,-19739,-19728,-19725,-19715,-19540,-19531,-19525,-19515,
-19500,-19484,-19479,-19467,-19289,-19288,-19281,-19275,-19270,-19263,-19261,-19249,
-19243,-19242,-19238,-19235,-19227,-19224,-19218,-19212,-19038,-19023,-19018,-19006,
-19003,-18996,-18977,-18961,-18952,-18783,-18774,-18773,-18763,-18756,-18741,-18735,
-18731,-18722,-18710,-18697,-18696,-18526,-18518,-18501,-18490,-18478,-18463,-18448,
-18447,-18446,-18239,-18237,-18231,-18220,-18211,-18201,-18184,-18183, -18181,-18012,
-17997,-17988,-17970,-17964,-17961,-17950,-17947,-17931,-17928,-17922,-17759,-17752,
-17733,-17730,-17721,-17703,-17701,-17697,-17692,-17683,-17676,-17496,-17487,-17482,
-17468,-17454,-17433,-17427,-17417,-17202,-17185,-16983,-16970,-16942,-16915,-16733,
-16708,-16706,-16689,-16664,-16657,-16647,-16474,-16470,-16465,-16459,-16452,-16448,
-16433,-16429,-16427,-16423,-16419,-16412,-16407,-16403,-16401,-16393,-16220,-16216,
-16212,-16205,-16202,-16187,-16180,-16171,-16169,-16158,-16155,-15959,-15958,-15944,
-15933,-15920,-15915,-15903,-15889,-15878,-15707,-15701,-15681,-15667,-15661,-15659,
-15652,-15640,-15631,-15625,-15454,-15448,-15436,-15435,-15419,-15416,-15408,-15394,
-15385,-15377,-15375,-15369,-15363,-15362,-15183,-15180,-15165,-15158,-15153,-15150,
-15149,-15144,-15143,-15141,-15140,-15139,-15128,-15121,-15119,-15117,-15110,-15109,
-14941,-14937,-14933,-14930,-14929,-14928,-14926,-14922,-14921,-14914,-14908,-14902,
-14894,-14889,-14882,-14873,-14871,-14857,-14678,-14674,-14670,-14668,-14663,-14654,
-14645,-14630,-14594,-14429,-14407,-14399,-14384,-14379,-14368,-14355,-14353,-14345,
-14170,-14159,-14151,-14149,-14145,-14140,-14137,-14135,-14125,-14123,-14122,-14112,
-14109,-14099,-14097,-14094,-14092,-14090,-14087,-14083,-13917,-13914,-13910,-13907,
-13906,-13905,-13896,-13894,-13878,-13870,-13859,-13847,-13831,-13658,-13611,-13601,
-13406,-13404,-13400,-13398,-13395,-13391,-13387,-13383,-13367,-13359,-13356,-13343,
-13340,-13329,-13326,-13318,-13147,-13138,-13120,-13107,-13096,-13095,-13091,-13076,
-13068,-13063,-13060,-12888,-12875,-12871,-12860,-12858,-12852,-12849,-12838,-12831,
-12829,-12812,-12802,-12607,-12597,-12594,-12585,-12556,-12359,-12346,-12320,-12300,
-12120,-12099,-12089,-12074,-12067,-12058,-12039,-11867,-11861,-11847,-11831,-11798,
-11781,-11604,-11589,-11536,-11358,-11340,-11339,-11324,-11303,-11097,-11077,-11067,
-11055,-11052,-11045,-11041,-11038,-11024,-11020,-11019,-11018,-11014,-10838,-10832,
-10815,-10800,-10790,-10780,-10764,-10587,-10544,-10533,-10519,-10331,-10329,-10328,
-10322,-10315,-10309,-10307,-10296,-10281,-10274,-10270,-10262,-10260,-10256,-10254
};
private static string[] pyName = new string[]
{
"A","Ai","An","Ang","Ao","Ba","Bai","Ban","Bang","Bao","Bei","Ben",
"Beng","Bi","Bian","Biao","Bie","Bin","Bing","Bo","Bu","Ba","Cai","Can",
"Cang","Cao","Ce","Ceng","Cha","Chai","Chan","Chang","Chao","Che","Chen","Cheng",
"Chi","Chong","Chou","Chu","Chuai","Chuan","Chuang","Chui","Chun","Chuo","Ci","Cong",
"Cou","Cu","Cuan","Cui","Cun","Cuo","Da","Dai","Dan","Dang","Dao","De",
"Deng","Di","Dian","Diao","Die","Ding","Diu","Dong","Dou","Du","Duan","Dui",
"Dun","Duo","E","En","Er","Fa","Fan","Fang","Fei","Fen","Feng","Fo",
"Fou","Fu","Ga","Gai","Gan","Gang","Gao","Ge","Gei","Gen","Geng","Gong",
"Gou","Gu","Gua","Guai","Guan","Guang","Gui","Gun","Guo","Ha","Hai","Han",
"Hang","Hao","He","Hei","Hen","Heng","Hong","Hou","Hu","Hua","Huai","Huan",
"Huang","Hui","Hun","Huo","Ji","Jia","Jian","Jiang","Jiao","Jie","Jin","Jing",
"Jiong","Jiu","Ju","Juan","Jue","Jun","Ka","Kai","Kan","Kang","Kao","Ke",
"Ken","Keng","Kong","Kou","Ku","Kua","Kuai","Kuan","Kuang","Kui","Kun","Kuo",
"La","Lai","Lan","Lang","Lao","Le","Lei","Leng","Li","Lia","Lian","Liang",
"Liao","Lie","Lin","Ling","Liu","Long","Lou","Lu","Lv","Luan","Lue","Lun",
"Luo","Ma","Mai","Man","Mang","Mao","Me","Mei","Men","Meng","Mi","Mian",
"Miao","Mie","Min","Ming","Miu","Mo","Mou","Mu","Na","Nai","Nan","Nang",
"Nao","Ne","Nei","Nen","Neng","Ni","Nian","Niang","Niao","Nie","Nin","Ning",
"Niu","Nong","Nu","Nv","Nuan","Nue","Nuo","O","Ou","Pa","Pai","Pan",
"Pang","Pao","Pei","Pen","Peng","Pi","Pian","Piao","Pie","Pin","Ping","Po",
"Pu","Qi","Qia","Qian","Qiang","Qiao","Qie","Qin","Qing","Qiong","Qiu","Qu",
"Quan","Que","Qun","Ran","Rang","Rao","Re","Ren","Reng","Ri","Rong","Rou",
"Ru","Ruan","Rui","Run","Ruo","Sa","Sai","San","Sang","Sao","Se","Sen",
"Seng","Sha","Shai","Shan","Shang","Shao","She","Shen","Sheng","Shi","Shou","Shu",
"Shua","Shuai","Shuan","Shuang","Shui","Shun","Shuo","Si","Song","Sou","Su","Suan",
"Sui","Sun","Suo","Ta","Tai","Tan","Tang","Tao","Te","Teng","Ti","Tian",
"Tiao","Tie","Ting","Tong","Tou","Tu","Tuan","Tui","Tun","Tuo","Wa","Wai",
"Wan","Wang","Wei","Wen","Weng","Wo","Wu","Xi","Xia","Xian","Xiang","Xiao",
"Xie","Xin","Xing","Xiong","Xiu","Xu","Xuan","Xue","Xun","Ya","Yan","Yang",
"Yao","Ye","Yi","Yin","Ying","Yo","Yong","You","Yu","Yuan","Yue","Yun",
"Za", "Zai","Zan","Zang","Zao","Ze","Zei","Zen","Zeng","Zha","Zhai","Zhan",
"Zhang","Zhao","Zhe","Zhen","Zheng","Zhi","Zhong","Zhou","Zhu","Zhua","Zhuai","Zhuan",
"Zhuang","Zhui","Zhun","Zhuo","Zi","Zong","Zou","Zu","Zuan","Zui","Zun","Zuo"
};
4. C#计算代码运行时间
//导入该命名空间 using System.Diagnostice; Stopwatch watch=new Stopwatch (); watch.Start(); /* 此处为要计算的运行代码 */ watch.Stop(); //获取当前实例测量得出的总运行时间（以毫秒为单位） string time = watch.ElapsedMilliseconds.ToString();
5. C#根据日期获取星期方法
protected void Page_Load(object sender, EventArgs e)
{
int m = System.DateTime.Today.Month;
int y = System.DateTime.Today.Year;
int d = System.DateTime.Today.Day;
int weeks = getWeekDay(y, m, d);
switch (weeks)
{
case 1:
this.TextBox1.Text = "星期一";
break;
case 2:
this.TextBox1.Text = "星期二";
break;
case 3:
this.TextBox1.Text = "星期三";
break;
case 4:
this.TextBox1.Text = "星期四";
break;
case 5:
this.TextBox1.Text = "星期五";
break;
case 6:
this.TextBox1.Text = "星期六";
break;
case 7:
this.TextBox1.Text = "星期日";
break;
}
}
/// <summary>根据日期，获得星期几</summary>
/// <param name="y">年</param>
/// <param name="m">月</param>
/// <param name="d">日</param>
/// <returns>星期几，1代表星期一；7代表星期日</returns>
public static int getWeekDay(int y, int m, int d)
{
if (m == 1) m = 13;
if (m == 2) m = 14;
int week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7 + 1;
return week;
}
6. C#删除文件夹的方法
/// <summary>
/// C# 删除文件夹
/// 用法： DeleteFolder(@"c:\\1");
/// </summary>
/// <param name="dir"></param>
private static void DeleteFolder(string dir)
{
// 循环文件夹里面的内容
foreach (string f in Directory.GetFileSystemEntries(dir))
{
// 如果是文件存在
if (File.Exists(f))
{
FileInfo fi = new FileInfo(f);
if (fi.Attributes.ToString().IndexOf("Readonly") != 1)
{
fi.Attributes = FileAttributes.Normal;
}
// 直接删除其中的文件
File.Delete(f);
}
else
{
// 如果是文件夹存在
// 递归删除子文件夹
DeleteFolder(f);
}
}
// 删除已空文件夹
Directory.Delete(dir);
}
希望本文所述对大家C#程序设计有所帮助。
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